Retaining ring for hole



FIG. 1 shows a front view of a retaining ring for hole showing my newdesign;

FIG. 2 shows a top view thereof;

FIG. 3 shows a bottom view thereof;

FIG. 4 shows a right side view thereof;

FIG. 5 shows a perspective view thereof; and,

FIG. 6 shows a perspective view thereof shown with a cylinder tube.

The broken line shown in FIGS. 6 is included for the purpose ofillustrating environment and form no part of the claimed design.

The ornamental design for a retaining ring for hole, as shown anddescribed.